e2fsprogs: Make -U option consistent between tune2fs and mke2fs

Allow "null", "clear", "random", or "time" for the -U option for
mke2fs, which are already allowed options for tune2fs.

Signed-off-by: Drew Davenport <ddavenport@google.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2 files changed